The Edit — Craft
The Small Parts Rule: What 'Not for Under 3' Means
The age on a toy box is often a choking warning, not a skill rating. What US federal rules ban for children under 3, which warning a toy for ages 3 to 8 must carry, and a plain way to check a toy at home.
This guide is research-led: we have not handled these units ourselves. If you buy through our links we may earn a commission — it never changes a pick. How we choose
This page reads the US federal small parts rules and explains the age warnings they put on toy boxes, with 1 home tester read against what owners report, as How we choose describes. Nothing here was handled or tested.
Safety 1st Small Object Choking Tester
Good fit A house with a baby and an older sibling
Not for A buyer who balks at the price of a tube
Toys for children under 3 may not contain small parts
A toy intended for a child under 3 that has a small part, or sheds one, is a banned hazardous substance under 16 CFR part 1501. The rule covers squeeze toys, teethers, crib toys, push and pull toys, blocks, bath toys, plush animals, baby dolls, ride-ons and toy cars meant for that age.
A small part is anything that fits entirely, without being squeezed and in any orientation, into the test cylinder. The cylinder is sized to approximate the fully expanded throat of a child under 3.
The warning on a toy for ages 3 to 8 is federal wording
Toys meant for ages 3 to 6 that contain a small part must carry a choking hazard statement. Toys for ages 3 to 8 that contain a small ball or a marble carry their own statement. Online listings for those toys have to show the same warning.
| The toy is | What the rule requires | Where it comes from |
|---|---|---|
| Meant for a child under 3 | No small parts, including pieces that break off in testing | 16 CFR part 1501 |
| For ages 3 to 6, with a small part | A choking hazard warning on the package | 16 CFR 1500.19 |
| For ages 3 to 8, with a small ball | A small ball warning | 16 CFR 1500.19 |
| For ages 3 to 8, with a marble | A marble warning | 16 CFR 1500.19 |
| Advertised online | The same warning as the package | 16 CFR 1500.20 |
A small ball, in the rule, is one that drops through a round hole 1.75 inches (44.4 mm) across under its own weight. Measure a ball against that before it goes into a younger sibling’s stocking.
Rattles, crayons and balloons fall outside 16 CFR part 1501
Balloons, paper books, crayons, chalk, pencils and pens, clothing and buttons, modelling clay, fingerpaints and watercolour sets are outside the federal small parts ban, as are feeding and grooming items and records: 10 kinds of product in all, listed in section 1501.3. Rattles and pacifiers are too, because each has a separate federal rule of its own.
The test also ignores bits of paper, fabric, yarn, fuzz, elastic and string that come loose. A plush toy’s loose thread does not fail it; a button eye that pulls off and fits the cylinder does.
A toy counts as for under 3 by more than its label
A maker cannot escape the rule just by printing 3+ on the box. The regulation looks at the maker’s stated age if it is reasonable, how the toy is advertised and marketed, and whether people commonly see it as a toy for a child under 3.
So a soft stacking toy or a push-along car is likely to be judged an under-3 toy whatever the box says. A building set with 500 bricks is not.
In a house with a baby, test the older child’s toys
The rule protects a 1-year-old from toys made for 1-year-olds. It does nothing about a 6-year-old’s LEGO or a 4-year-old’s marble run on the same floor. A choke tester gives the same answer as the cylinder in the rule: if the piece falls inside, keep it away from the baby.
Safety 1st Small Object Choking Tester
301 ratings at 4.8, a plastic tube for checking whether a small object is a choking hazard, which owners and teachers keep near the toy box.
Current price shown on Amazon. We may earn a commission.
| Type | Small object choke tester |
|---|
301 ratings at 4.8. Owners describe the tester as a simple way to teach a household, or a classroom, what is too small for a toddler, and say it gives peace of mind. Value is the split: most think it worth having, a few think it overpriced for what it is.
Buy it if
- A house with a baby and an older sibling
Don't buy it if
- A buyer who balks at the price of a tube
For what the age on a board game means, board game age ratings explains the difference between a rule and a recommendation. For gifts built for the youngest children, toys for 1-year-olds compares 7 by what they teach, and are squishy toys safe covers the other US toy test.